/*-

 * Copyright (c) 1982, 1986, 1989, 1991, 1993

 *	The Regents of the University of California.  All rights reserved.

 * (c) UNIX System Laboratories, Inc.

 * All or some portions of this file are derived from material licensed

 * to the University of California by American Telephone and Telegraph

 * Co. or Unix System Laboratories, Inc. and are reproduced herein with

 * the permission of UNIX System Laboratories, Inc.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *	@(#)signal.h	8.4 (Berkeley) 5/4/95

 * $FreeBSD: src/sys/sys/signal.h,v 1.45 2004/06/11 11:43:46 phk Exp $

 */

#ifndef _SYS_SIGNAL_H_

#define	_SYS_SIGNAL_H_

#include <sys/cdefs.h>

#include <sys/_types.h>

#include <sys/_sigset.h>

#include <machine/signal.h>	/* sig_atomic_t; trap codes; sigcontext */

/*

 * System defined signals.

 */

#define	SIGHUP		1	/* hangup */

#define	SIGINT		2	/* interrupt */

#define	SIGQUIT		3	/* quit */

#define	SIGILL		4	/* illegal instr. (not reset when caught) */

#define	SIGTRAP		5	/* trace trap (not reset when caught) */

#define	SIGABRT		6	/* abort() */

#define	SIGIOT		SIGABRT	/* compatibility */

#define	SIGEMT		7	/* EMT instruction */

#define	SIGFPE		8	/* floating point exception */

#define	SIGKILL		9	/* kill (cannot be caught or ignored) */

#define	SIGBUS		10	/* bus error */

#define	SIGSEGV		11	/* segmentation violation */

#define	SIGSYS		12	/* non-existent system call invoked */

#define	SIGPIPE		13	/* write on a pipe with no one to read it */

#define	SIGALRM		14	/* alarm clock */

#define	SIGTERM		15	/* software termination signal from kill */

#define	SIGURG		16	/* urgent condition on IO channel */

#define	SIGSTOP		17	/* sendable stop signal not from tty */

#define	SIGTSTP		18	/* stop signal from tty */

#define	SIGCONT		19	/* continue a stopped process */

#define	SIGCHLD		20	/* to parent on child stop or exit */

#define	SIGTTIN		21	/* to readers pgrp upon background tty read */

#define	SIGTTOU		22	/* like TTIN if (tp->t_local&LTOSTOP) */

#define	SIGIO		23	/* input/output possible signal */

#define	SIGXCPU		24	/* exceeded CPU time limit */

#define	SIGXFSZ		25	/* exceeded file size limit */

#define	SIGVTALRM	26	/* virtual time alarm */

#define	SIGPROF		27	/* profiling time alarm */

#define	SIGWINCH	28	/* window size changes */

#define	SIGINFO		29	/* information request */

#define	SIGUSR1		30	/* user defined signal 1 */

#define	SIGUSR2		31	/* user defined signal 2 */

#define	SIGTHR		32	/* Thread interrupt. */

/*

 * XXX missing SIGRTMIN, SIGRTMAX.

 */

#define	SIG_DFL		((__sighandler_t *)0)

#define	SIG_IGN		((__sighandler_t *)1)

#define	SIG_ERR		((__sighandler_t *)-1)

/*

 * XXX missing SIG_HOLD.

 */

/*-

 * Type of a signal handling function.

 *

 * Language spec sez signal handlers take exactly one arg, even though we

 * actually supply three.  Ugh!

 *

 * We don't try to hide the difference by leaving out the args because

 * that would cause warnings about conformant programs.  Nonconformant

 * programs can avoid the warnings by casting to (__sighandler_t *) or

 * sig_t before calling signal() or assigning to sa_handler or sv_handler.

 *

 * The kernel should reverse the cast before calling the function.  It

 * has no way to do this, but on most machines 1-arg and 3-arg functions

 * have the same calling protocol so there is no problem in practice.

 * A bit in sa_flags could be used to specify the number of args.

 */

typedef	void __sighandler_t(int);

#if __POSIX_VISIBLE || __XSI_VISIBLE

#ifndef _SIGSET_T_DECLARED

#define	_SIGSET_T_DECLARED

typedef	__sigset_t	sigset_t;

#endif

#endif

#if __POSIX_VISIBLE || __XSI_VISIBLE

struct __siginfo;

/*

 * Signal vector "template" used in sigaction call.

 */

struct sigaction {

	union {

		void    (*__sa_handler)(int);

		void    (*__sa_sigaction)(int, struct __siginfo *, void *);

	} __sigaction_u;		/* signal handler */

	int	sa_flags;		/* see signal options below */

	sigset_t sa_mask;		/* signal mask to apply */

};

#define	sa_handler	__sigaction_u.__sa_handler

#endif

#if __POSIX_VISIBLE || __XSI_VISIBLE

#define	SA_NOCLDSTOP	0x0008	/* do not generate SIGCHLD on child stop */

#endif /* __POSIX_VISIBLE || __XSI_VISIBLE */

#if __XSI_VISIBLE

#define	SA_ONSTACK	0x0001	/* take signal on signal stack */

#define	SA_RESTART	0x0002	/* restart system call on signal return */

#define	SA_RESETHAND	0x0004	/* reset to SIG_DFL when taking signal */

#define	SA_NODEFER	0x0010	/* don't mask the signal we're delivering */

#define	SA_NOCLDWAIT	0x0020	/* don't keep zombies around */

#define	SA_SIGINFO	0x0040	/* signal handler with SA_SIGINFO args */

#endif

#if __BSD_VISIBLE

#define	NSIG		32	/* number of old signals (counting 0) */

#endif

#endif /* !_SYS_SIGNAL_H_ */